Mining-machine chuck.



P. NUGBNT. MINING MACHINE CHUCK. APPLICATION FILED SEPT. 23, 1913.

1,109,865, 7 Patented Sept. 8, 1914.

VWLZ.

citizen of the 'United UNITED sTATns PATENT @FFICE.

FREDERICK NUGENT, OF MACE, IDAHO, ASSIG-NOR OF ONE-HALF TO LEVI R. NUGENT,

OF MISSOULA, MONTANA.

MINING-MACHINE CHUCK.

Specification of Letters Patent.

Patented Sept. 8, 1914;.

Application filed September 23, 1813. Serial No. 791,381.

To all whom it may concern v i Be it known that I, FREDERICK Nueniv'r, a States, residing at Mace, in the county of Shoshone and State of Idaho, have invented new and useful Improvements in Mining-Machine Chucks,

' of the socket and adapted to bind against of which the following is a specification.

This invention relates to improvements in drill chucks,' and has particular. application .to what are known as self? tightening wCllHCkS. v e i In carrying out my invention-it is' my in tention to provide a self-tightening drill chuck which will embody among other features a tool holder anda keying ring 'surrounding the tool holder and capable of sliding movement thereon so that the .tool' may be secured within the holder or socketi and removed therefrom, aspring-pressed; dog being interposed between the chuck. body or tool holder and the ring. and acting to limit the movement of the latter to releasing position thereby-preventing the accidental removal of the ring from the chuck body.

-"It is also my purpose to provide a chuck I of the class described which will embrace the desired features of simplicity, efiiciency and durability, one which may be manufactured and marketed at a minimum expense and one which may be quickly and conveniently manipulated to clamp and release the drill steel.

l/Vith'the above and other objects in view, the invention consists in the. constructlon, combination and arrangement of parts here inafter set forth in and falling within the scope of the claims.

In the accompanying drawings :F1gure 1 is a view in side elevation of a self tightening drill chuck constructed accordance with my present invention;"F1g.2 1s. a 1on5 gitudinal sectional view through the same; Fig. 8 is a cross sectional view therethrough on the line 3-3 of Fig. 2; and Fig. 4 1s a similar view on the line 4.4c of Fig. 1.

Referring now to the accompanying drawings in detail, the numeral 1 deslgnates the chuck body having the tool socket 2 formed therein and opening onto the outer end thereof and lined with a bushingS of some suitable material. Formed in the chuck body is a radial slot 4 communicating with the tool socket 2 and opening onto the outer 1 the rear,

I surface of the body. In the present instance outer surface of the body and intersects the key 6 having the inner end thereof curved cross sectlonally to conform to the contour the adjacent portionof the steel or tool,

from the forward end of the body toward as at 7. In this instance, the key 6 at the upper longitudinal edge thereof is ormed with laterally projecting wings 88 having the under edges thereof designed to seat within the longitudinal groove 5 and theupper edges inclined to correspond with the inclined edge of the key.

Thenumeral 9 designates what may be termed a keying ring surrounding the chuck body and capable of sliding movement thereon and having the inner wall thereof formed with a longitudinal groove 10 provided with an inclined lower wall 11 corresponding to the inclined edge 7. of the key and adapted to engage such edge, in the sliding of the ring to clamping position, to force the key into the slot and so as to maintain the tool or steel within the socket,

inclined wall 11 of thegroovej 10 and the similar wall or edgeof .the key 6.

In order to limit the sliding movement of thekeying ring to releasing position, I em- 13 formed in the chuck body 1 at a point diametrically opposite the slot 4, a spring 14 being interposed; between the lower wall of the slot 13 and the confronting edge of the dog 12 acting upon the dog to force the latter outwardly of the slot. This dog plays within a groove 15. formed in theinner surface of the ring 9at a point diametrically opposite the wedging groove, the groove 15 having the opposite ends thereof closed so that accidental removal of the keying ring from the chuck body is avoided incident to contact with the end walls of the groove 15. Vhen it is desired to remove the keying ring from the chuck body the keying ring is moved to releasing position until arrested by the dog 12 at which time a suitable pin is passed through an aperture 16 in the ring 9 contiguous the groove 15, such pin engaging the dog 12 to force the latter to releasing a longitudinal groove 5 is formed in the radial slot. Passed through the slot 4 is a while the outer edge thereof is: inclined a wedging action being set up between the ploy a dog 12 mounted within a radial slot position against the action of the spring 14, thus the keying ring may be removed from the chuck body.

In some instances, the wedging action set up between the inclined wall 11 of the wedging groove and the similar edge of the wedging key may be such that the keying ring will not readily slide to releasing position, and in order that the ring may be conveniently manipulated under such circumstances I form a transverse wedge-shaped slot 17 in the body 1 immediately adjacent to the outer end thereof, such slot receiving the wedgeshaped key 18, which when forced through the slot under pressure acts upon the adjacent edge of the keying ring to slide the latter along the chuck body to releasing position.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation and manner of employing my invention will be readily apparent. It will be seen that I have provided a drill chuck wherein the keying ring is at all times held upon the chuck body and may be removed therefrom when desired, while the parts of the chuck are so correlated and arranged that the possibility of derangement is reduced to a minimum.

Having thus described my invention, what I claim is 1. In a self tightening drill chuck, a chuck body having a tool socket therein and formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body adapted to force said key into engagement with the tool, and a spring-pressed dog acting upon said ring to limit the movement thereof to releasing position.

2. In a self tightening drill chuck, a chuck body having a tool socket therein formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body and adapted,

to force said key into engagement with the tool, and means for slidingsaid ring to releasing position in the event of undue binding between the parts.

3. In a self tightening drill chuck, a chuck body having a tool socket therein formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body and adapted to force said key into engagement with the tool, and a wedge-shaped key adapted to slide said ring to releasing position in the event of undue binding between the parts.

4. In a self tightening drill chuck, a chuck body having a tool socket therein and formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body and adapted to force said key into engagement with the tool, and a spring pressed dog carried by said chuck body and engaging the inner wall of said ring to limit the movement thereof to releasing position.

5. In a self tightening drill chuck, a chuck body having a tool socket therein and formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body and adapted to forcesaid key into engagement with the tool,'and a spring pressed dog carried'by said chuck 'bod y andengaging the inner wall of said ring to limit the movement thereof to releasingposition, said ring being provided with means whereby an instrument may be inserted to relieve said ring of the influence of said dog.

6. In a self tightening drill chuck, a chuck body having a tool socket therein and formed with a radial slot opening onto the outer surface thereof, a key within said slot, a ring surrounding said chuck body and adapted to force said' key' into engagement with the tool, a spring pressed dog carried by said chuck body and engaging the inner wall of said ring to limit the movement thereof to releasing position, and a wedge-shaped key operable to slide said ring to releasing position in the event of undue binding between the parts.

In testimony whereof I afiix my signature in presence of two witnesses.

FREDERICK NUGENT.

"Witnesses:

JOHN H. TOLAN, LEVI R. NUGENT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, I). C. 

